Unemployed engineer Stanley Hill (John Travolta) witnesses the murder of his wife Vivian (Rebecca De Mornay), who was attacked by thugs in a parking garage. Wracked with guilt, Stanley is haunted by the image of Vivian dying in his arms. When Detective Gibson (Sam Trammell) and other corrupt police officers are unable to bring the killers to justice, Stanley turns to his old friend Dennis (Christopher Meloni) and decides to take matters into his own hands. It is only then that Stanley and Dennis are found to have a mysterious past that, until now, they have kept very well hidden. As they inflict their revenge, those involved in the cover up realise that Stanley and Dennis are more dangerous than they could ever have imagined…